Turbine vane baffle chimney

Abstract

A turbine vane includes an airfoil section with an airfoil wall defining a leading edge and a trailing edge. A first side extends from the leading edge to the trailing edge and extends from a first end of the airfoil section to a second end of the airfoil section. A second side extends from the leading edge to the trailing edge and extends from the first end to the second end of the airfoil section. The airfoil wall also circumscribes an internal core cavity. A platform is attached to the first end of the airfoil section and a platform cavity is formed in the platform. A baffle is in the internal core cavity and includes a baffle tube extending from a first tube end to a second tube end. A chimney is connected to the first tube end and extends completely through the platform cavity.

1 . A turbine vane comprising:
 an airfoil section comprising an airfoil wall defining a leading edge, a trailing edge, a first side extending from the leading edge to the trailing edge and extending from a first end of the airfoil section to a second end of the airfoil section, a second side extending from the leading edge to the trailing edge and extending from the first end to the second end of the airfoil section, and the airfoil wall circumscribing an internal core cavity;   a platform attached to the first end of the airfoil section;   a platform cavity formed in the platform;   a cover plate covering the platform cavity such that the platform cavity is between the airfoil section and the cover plate;   a baffle in the internal core cavity, wherein the baffle comprises:
 a baffle tube extending from a first tube end to a second tube end; and 
 a chimney connected to the first tube end and extending completely through the platform cavity, and wherein the chimney extends through the cover plate; and 
   a gap between the cover plate and the chimney, wherein the gap forms a flow path around the chimney that extends through the platform and into the platform cavity.   
     
     
         2 . The turbine vane of  claim 1 , further comprising:
 impingement holes extending through the cover plate.   
     
     
         3 . (canceled) 
     
     
         4 . The turbine vane of  claim 2 , wherein the baffle further comprises:
 a cap connected to the first end of the baffle tube, and wherein the chimney extends from the cap through the platform cavity and the cover plate.   
     
     
         5 . The turbine vane of  claim 4 , wherein the first end of the baffle tube and the cap separate the platform cavity from the internal core cavity. 
     
     
         6 . The turbine vane of  claim 5 , further comprising:
 a baffle stop formed between the platform cavity and the internal core cavity, and wherein the first end of the baffle tube and/or the cap abut the baffle stop.   
     
     
         7 . The turbine vane of  claim 6 , wherein the baffle stop is a shelf and/or a protrusion between the platform cavity and the internal core cavity. 
     
     
         8 . The turbine vane of  claim 7 , wherein the platform is an outer platform of the turbine vane. 
     
     
         9 . The turbine vane of  claim 8 , wherein the internal core cavity is adjacent to the leading edge of the airfoil section. 
     
     
         10 . A turbine vane for a gas turbine engine, wherein the turbine vane comprises:
 an airfoil section comprising an airfoil wall defining a leading edge, a trailing edge, a first side extending from the leading edge to the trailing edge and extending from a radially inner end of the airfoil section to a radially outer end of the airfoil section relative to a center line of the gas turbine engine, a second side extending from the leading edge to the trailing edge and extending from the radially inner end to the radially outer end of the airfoil section, and the airfoil wall circumscribing an internal core cavity;   an outer platform attached to the radially outer end of the airfoil section;   a platform cavity formed in the outer platform;   a cover plate covering the platform cavity and comprising impingement holes;   a baffle in the internal core cavity, wherein the baffle comprises:
 a baffle tube extending within the internal core cavity; and 
 a chimney extending from the baffle tube and extending completely through the platform cavity and the cover plate; and 
   an annular gap between the cover plate and the chimney, and wherein the annular gap forms a flow path between the cover plate and the chimney, and wherein the flow path extends across the cover plate to fluidically connect with the platform cavity.   
     
     
         11 . The turbine vane of  claim 10 , wherein the baffle further comprises:
 a flat cap connected to an end of the baffle tube, and wherein the chimney extends from the flat cap through the platform cavity and the cover plate.   
     
     
         12 . The turbine vane of  claim 11 , wherein the end of the baffle tube and the flat cap separate the platform cavity from the internal core cavity. 
     
     
         13 . The turbine vane of  claim 12 , further comprising:
 a baffle stop formed between the platform cavity and the internal core cavity, and   wherein the end of the baffle tube and/or the flat cap abut the baffle stop.   
     
     
         14 . (canceled) 
     
     
         15 . A turbine vane comprising:
 an airfoil section comprising an airfoil wall defining a leading edge, a trailing edge, a pressure side extending from the leading edge to the trailing edge and extending from a first end of the airfoil section to a second end of the airfoil section, a suction side extending from the leading edge to the trailing edge and extending from the first end to the second end of the airfoil section, and the airfoil wall circumscribing an internal core cavity;   a platform attached to the first end of the airfoil section;   an impingement cavity formed in the platform; and   a cover plate covering the impingement cavity and comprising impingement holes extending through the cover plate;   a baffle in the internal core cavity, wherein the baffle comprises:
 a baffle tube extending in the internal core cavity; and 
 a chimney extending from the baffle tube and through the cover plate; and 
   a gap extending around the chimney and between the cover plate and the chimney, and wherein the gap forms a flow path that extends across the cover plate and into the impingement cavity.   
     
     
         16 . The turbine vane of  claim 15 , wherein the baffle separates the internal core cavity from the impingement cavity of the platform. 
     
     
         17 . (canceled) 
     
     
         18 . The turbine vane of  claim 16 , wherein the chimney is a cylindrical tube. 
     
     
         19 . The turbine vane of  claim 16 , further comprising:
 a second platform connected to a second end of the airfoil section, and   wherein the baffle tube extends from the platform to the second platform in the internal core cavity.   
     
     
         20 . The turbine vane of  claim 16 , further comprising:
 wherein the baffle tube comprises cooling holes that fluidically connect the chimney with the internal core cavity.